Ocean Acidification and Marine Life

Sue Ann Watson discusses ocean acidification, its causes, and impacts on marine life. The video explains how increased carbon dioxide emissions from human activities lead to ocean acidification, affecting marine organisms' ability to form calcium carbonate shells and skeletons. Historical data and future projections show significant changes in ocean chemistry, posing challenges for marine ecosystems.

What is the primary cause of ocean acidification?

• Increased levels of methane in the atmosphere

• Increased levels of nitrogen in the atmosphere

• Increased levels of carbon dioxide in the atmosphere

• Decreased levels of oxygen in the atmosphere

How does carbon dioxide affect ocean water when it dissolves?

• It forms carbonic acid, increasing the water's acidity

• It decreases the temperature of the water

• It increases the salinity of the water

• It forms oxygen, increasing the water's alkalinity

What has been the trend in carbon dioxide levels over the past 650,000 years?

• They have remained relatively stable until recently

• They have been decreasing steadily

• They have fluctuated wildly without any pattern

• They have been increasing steadily

What is the effect of a 0.1 unit drop in ocean pH?

• A 30% increase in ocean acidity

• A 20% increase in ocean acidity

• A 10% increase in ocean acidity

• A 40% increase in ocean acidity

What is the projected atmospheric carbon dioxide level by the end of this century if current trends continue?

• 1100 parts per million

• 500 parts per million

• 900 parts per million

• 700 parts per million

What is the role of the Intergovernmental Panel on Climate Change?

• To regulate fishing activities

• To produce projections of future climate scenarios

• To monitor ocean pollution levels

• To manage marine protected areas

What is the significance of calcium carbonate for marine organisms?

• It is a source of food for marine organisms

• It is used by marine organisms to build shells and skeletons

• It helps marine organisms to breathe underwater

• It provides energy for marine organisms

What happens to marine organisms' shells and skeletons as ocean acidity increases?

• They become more colorful

• They dissolve more easily

• They become stronger and more resilient

• They grow at a faster rate

What is the saturation state of seawater with respect to calcium carbonate?

• It determines the water's ability to dissolve calcium carbonate

• It measures the water's temperature

• It indicates the amount of oxygen in the water

• It reflects the water's salinity levels

What is the impact of reduced saturation states on marine life?

• It makes it harder for marine life to build shells

• It increases the growth rate of marine life

• It has no impact on marine life

• It makes it easier for marine life to build shells